#!/bin/bash

# blob:summary=Pick a color theme from the local and bundled sets
# blob:args=[--mode|--print]

user_themes_dir="$HOME/.config/blob/themes"
current_dir="$HOME/.local/state/blob/current"

prettify() {
  echo "$1" | sed -E 's/(^|-)([a-z])/\1\u\2/g; s/-/ /g'
}

current_mode() {
  local name
  name=$(cat "$current_dir/theme.name" 2>/dev/null)
  if [ "$name" = "blob-dynamic" ]; then
    echo "dynamic"
  else
    echo "static"
  fi
}

theme_swatches() {
  awk -F'"' '
    /^[a-z_]+ *= *"#[0-9A-Fa-f]+"/ {
      split($1, key_parts, /[ =]/)
      colors[key_parts[1]] = $2
    }
    END {
      count = split("background foreground accent red green yellow blue magenta cyan", swatch_keys, " ")
      for (index_number = 1; index_number <= count; index_number++) {
        color = colors[swatch_keys[index_number]]
        if (color != "") printf "%s%s", (printed++ ? " " : ""), color
      }
    }
  ' "$1"
}

list_theme_rows() {
  local dynamic_colors="$current_dir/theme/colors.toml"
  local dynamic_swatches=""
  [ "$(current_mode)" = "dynamic" ] && [ -f "$dynamic_colors" ] && dynamic_swatches=$(theme_swatches "$dynamic_colors")
  printf '\tDynamic (from wallpaper)\tblob-dynamic\t%s\n' "$dynamic_swatches"

  {
    find "$user_themes_dir" -mindepth 1 -maxdepth 1 -type d 2>/dev/null
    find "$BLOB_PATH/themes" -mindepth 1 -maxdepth 1 -type d 2>/dev/null
  } | while read -r theme_dir; do
    [ -f "$theme_dir/colors.toml" ] || continue
    slug=$(basename "$theme_dir")
    [ "$slug" = "blob-dynamic" ] && continue
    printf '\t%s\t%s\t%s\n' "$(prettify "$slug")" "$slug" "$(theme_swatches "$theme_dir/colors.toml")"
  done | sort -u -t$'\t' -k3,3
}

print_current_colors() {
  local colors_file="$current_dir/theme/colors.toml"
  if [ ! -f "$colors_file" ]; then
    echo "No active theme colors.toml found at $colors_file" >&2
    exit 1
  fi
  awk '1' "$colors_file"
}

case "$1" in
--mode)
  current_mode
  ;;
--print)
  print_current_colors
  ;;
*)
  selection=$(list_theme_rows | blob-menu-select "Select Theme" -- --width 800) || exit 0
  slug=$(printf '%s' "$selection" | cut -f2)
  [ -n "$slug" ] || exit 0
  if [ "$slug" = "blob-dynamic" ]; then
    exec blob-theme-dynamic
  fi
  awww kill --all >/dev/null 2>&1
  exec blob-theme-set "$slug"
  ;;
esac